I recently upload a new version of Survival Horde EE, a modified Survival Horde map. This worked fine. People could download it and play it. Then I upload a new version, and downloads stopped working. The map itself definitely works, and I've tried to upload it again (each time with a higher version) several times, just to get the same download error in the vault. Finally I renamed the map to Survival Horde EE9 and uploaded that, just to run into the same issue again.
Any help is much appreciated.